CONAN.utils.transit_depth

CONAN.utils.transit_depth#

CONAN.utils.transit_depth(RpRs, b)#

Calculate the area of overlap between two circles (planet and star) given the impact parameter. This gives the expected transit depth (accurate to <0.1ppm)for a planet transiting a uniform intensity star. This uses the formula for the area of intersection of two circles. For full overlap, we get RpRs**2.

Parameters:

  • RpRs (float,) – Radius of the planet in units of the star’s radius.

  • b (float) – Impact parameter (distance from the center of the star to the center of the planet).

Returns:

transit_depth – The area of overlap between the two circles, normalized by the area of the star.

Return type:

float

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